Canada

I suppose it's time to double down on this and make backups. It's something that was routinely done with the Internet in the 20th Century, usually with FTP repositories. The reason for the mirror site was for site performance and improving accessibility when the Internet backbone was in a lot of places slower than today's typical fiber to the home Internet connection.

I know the Wayback Machine does this, but proper site mirroring ensures everything gets copied and placed on a different server.